Photographic-printing frame



Patented Dec. 28, 1884.

J. A. H. PARSONS PHOTOGRAPHIG PRINTING FRAME.

(No Model.)

VVITJVESSES J'O :5, Jazz UNITED STATES PATENT OFFICE.

JOHN A. H. PARSONS, OF IYHEE'LING, "WEST VIRGINIA.

PHOTOGRAPHlC-PRINTiNG FRAME.

SPECIFICATION forming part of Letters Patent No. 309,736, dated December23, 1884.

Application filed June 19, 1884. (X0 model.)

T 0 tZZ whom it may concern.-

Be it known that I, JOHN A. H. PARSONS, a resident of Vheeling, in thecounty ofOhio and State of lost Virginia, have invented certain new anduseful Improvements in Photographic-Printing Frames; and I do herebydeclare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same, refer- 'ence being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

This invention relates to certain improvements in photographic-printingframes; and it has for its object to provide a vignetting attachmentthat may be readily attached to any frame and the parts adjusted so asto secure the proper vignetting result when exposed for printing, asmore fully hereinafter specified. This object I attain by the meansillustrated in the accompanying drawings, in which Figure 1 represents aperspective view of an ordinary printing-frame, showing my improvedvignettin g attachment applied thereto. Fig. 2 represents a longitudinalvertical sec tion of the printing-frame and the vignetting attachment;and Fig. 3 represents a back view of the printing-frame, showing a sideview of the clamps by which the vignetting attachment is securedthereto.

The letter A indicates the printing-frame, which may be of the ordinaryor any approved construction, and B indicates the vignetting -frame. Thesaid vignetting -frame consists of a flat sheet of metal having upturnededges B on flanges at the sides and a central opening of rectangular orother shape, as shown. The said vignetting-frame is secured to theprinting-frame by means of the longitudinal clamping-plates O, which arepreferably constructed of metal, having downwardly-turned flanges D attheir upper edges, which set over the side flanges of thevignetting-frame and hold it to the face of the printing-frame, at thesame time allowing the vignetting-frame to be adjusted longitudinally onthe printing-fra1ne. The vignetting-frame, around its opening, isprovided with a vertical rim, E, which is inclined from the lower to theupper end, and over this rim is fitteda similarly-shaped hood, F, whichis hinged at its lower or smaller end to the vignettingframe contiguousto the lower or smaller end of the rim E, whereby its angle may bevaried with respect to the printing-frame and the negative from whichthe positive is to be printed. The upper plate or top of the hood has anopening, G, and the sides areprovided with springs H, secured tosuitable supports, I, and having loosely-connected cross-bars K, whichare adapted to hold the sheet on plate L upon the upper face or top ofthe hood in proper position. The said sheet or plate has a centralperforation or opening, M, for the transmission of light to thenegative, and is provided with the usual translucent medium of groundglass, tissue-paper, or other suitable material for softening the lighttoward the edges of the picture to produce the proper vignetting effectin the printed positive. The side clamps, which secure thevignetting-frame to the printing-frame, are provided with inclinedslots, by means of which they may be secured to the printing-frame bythe set-screws N, and at their ends are provided with bentwire braces P,by which they are made to keep their form and securely hold the upturnededges of the vignetting-frame.

As constructed, it will be perceived that the vignetting-frame may bereadily applied to any printing-frame and its angle readily adjusted tosuit the direction of the light, and that while the vignetting-frainemay be adjusted longitudinally to correspond to the pic ture upon thenegative the vignettingplate may be adjusted in all directions, so as toproduce the proper vignetting effect around the print.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. The combination,with a photographicprinting frame, of the side clampshaving oblique slots and secured thereto by means of set-screws, andprovided with downturned flanges at their upper edges adapted to hold alongitudinally-movable Vignetting-plate, substantially as specified.

2. The combination, with the longitudinal clamping-plates, of thevignetting-plate with llanged sides adapted to move longitudinally underthe clamping plates, substantially as specified.

3. The combination, with the vignetting- 5 frame having an inclined rim,of the similarly-shaped hood hinged to the vignettingframe, whereby theangle of said frame may be adjusted, substantially as specified.

at. The combination, with the yignetting- :0 frame, of the springsextending from the center to each end of the frame, and cross-wireswhereby the vignetting-plate maybe adjusted and held, substantially asspecified.

In testimony that I claim the foregoing as my own I hereby affix mysignature in pres- 1 5 once of two witnesses.

Witnesses:

S. L. STOUT, G110. K. S'romr.

